[libvirt PATCH 12/12] qemu_conf: Use automatic memory management
Signed-off-by: Tim Wiederhake <twiederh(a)redhat.com>
---
src/qemu/qemu_conf.c | 70 ++++++++++++++++++--------------------------
1 file changed, 29 insertions(+), 41 deletions(-)
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 81449b8b77..4b5f75b694 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -85,17 +85,6 @@ static int virQEMUConfigOnceInit(void)
VIR_ONCE_GLOBAL_INIT(virQEMUConfig);
-static void
-qemuDriverLock(virQEMUDriver *driver)
-{
- virMutexLock(&driver->lock);
-}
-static void
-qemuDriverUnlock(virQEMUDriver *driver)
-{
- virMutexUnlock(&driver->lock);
-}
-
#ifndef DEFAULT_LOADER_NVRAM
# define DEFAULT_LOADER_NVRAM \
"/usr/share/OVMF/OVMF_CODE.fd:/usr/share/OVMF/OVMF_VARS.fd:" \
@@ -1279,11 +1268,9 @@ virQEMUDriverConfigSetDefaults(virQEMUDriverConfig *cfg)
virQEMUDriverConfig *virQEMUDriverGetConfig(virQEMUDriver *driver)
{
- virQEMUDriverConfig *conf;
- qemuDriverLock(driver);
- conf = virObjectRef(driver->config);
- qemuDriverUnlock(driver);
- return conf;
+ VIR_LOCK_GUARD lock = virLockGuardLock(&driver->lock);
+
+ return virObjectRef(driver->config);
}
virDomainXMLOption *
@@ -1303,16 +1290,13 @@ virQEMUDriverCreateXMLConf(virQEMUDriver *driver,
virCPUDef *
virQEMUDriverGetHostCPU(virQEMUDriver *driver)
{
- virCPUDef *hostcpu;
-
- qemuDriverLock(driver);
-
- if (!driver->hostcpu)
- driver->hostcpu = virCPUProbeHost(virArchFromHost());
+ virCPUDef *hostcpu = NULL;
- hostcpu = driver->hostcpu;
-
- qemuDriverUnlock(driver);
+ VIR_WITH_MUTEX_LOCK_GUARD(&driver->lock) {
+ if (!driver->hostcpu)
+ driver->hostcpu = virCPUProbeHost(virArchFromHost());
+ hostcpu = driver->hostcpu;
+ }
if (hostcpu)
virCPUDefRef(hostcpu);
@@ -1389,32 +1373,36 @@ virCaps *virQEMUDriverCreateCapabilities(virQEMUDriver *driver)
* Returns: a reference to a virCaps *instance or NULL
*/
virCaps *virQEMUDriverGetCapabilities(virQEMUDriver *driver,
- bool refresh)
+ bool refresh)
{
+ bool force_refresh = false;
virCaps *ret = NULL;
+
if (refresh) {
virCaps *caps = NULL;
if ((caps = virQEMUDriverCreateCapabilities(driver)) == NULL)
return NULL;
- qemuDriverLock(driver);
- virObjectUnref(driver->caps);
- driver->caps = caps;
- } else {
- qemuDriverLock(driver);
-
- if (driver->caps == NULL ||
- driver->caps->nguests == 0) {
- VIR_DEBUG("Capabilities didn't detect any guests. Forcing a "
- "refresh.");
- qemuDriverUnlock(driver);
- return virQEMUDriverGetCapabilities(driver, true);
+ VIR_WITH_MUTEX_LOCK_GUARD(&driver->lock) {
+ virObjectUnref(driver->caps);
+ driver->caps = caps;
+ ret = virObjectRef(driver->caps);
}
+
+ return ret;
+ }
+
+ VIR_WITH_MUTEX_LOCK_GUARD(&driver->lock) {
+ force_refresh = driver->caps == NULL || driver->caps->nguests == 0;
+ if (!force_refresh)
+ ret = virObjectRef(driver->caps);
}
- ret = virObjectRef(driver->caps);
- qemuDriverUnlock(driver);
- return ret;
+ if (!force_refresh)
+ return ret;
+
+ VIR_DEBUG("Capabilities didn't detect any guests. Forcing a
refresh.");
+ return virQEMUDriverGetCapabilities(driver, true);
}
--
2.31.1